Grey Iron weight units, balance weight, weight unit,Cast Iron Weight M1 class;2kg,5kg,10kg,20kg,50kg,100kg,200kg,500kg,1000kg Iron weight units, weights, balance weight, weight unit,Cast Iron Weight1. M1 class available2. weight: 2kg,5kg, 10kg, 20kg, 50kg, 100kg, 200kg, 500kg, 1000kg is available3. Stainless steel weights is available F1 class Cast Iron Weights